PDF Compressor
Reduce the file size of your PDF documents while maintaining quality.
About this tool
Free PDF Compressor — Reduce PDF File Size for Email & Web
Our free online PDF compressor reduces PDF file size by up to 90% while preserving readable quality and document integrity. Compress PDF for email attachments, optimize PDFs for website downloads, shrink scanned documents for cloud storage, or fit large reports under upload size limits — all in your browser without software installs or signup requirements.
PDF documents quickly grow large when they contain scanned images, embedded fonts, or high-resolution graphics. Email providers like Gmail and Outlook impose attachment limits, file-sharing services charge for large uploads, and slow-loading PDF downloads hurt website performance. Our professional PDF compression tool solves all these problems with smart compression that balances file size against visual fidelity.
Key features
Smart Compression Algorithms
Advanced PDF optimization reduces file size by compressing images, removing redundant data, and subsetting fonts.
Multiple Quality Levels
Choose between low, medium, and high compression depending on your use case and quality requirements.
Preserves Text & Searchability
Compressed PDFs remain fully searchable, copyable, and accessible — only image data is optimized.
Batch Processing
Pro users can compress multiple PDF files at once for efficient bulk document optimization.
How to use this tool
- 01
Upload your PDF file by clicking the upload area or dragging it in (up to 5 MB free, larger on Pro).
- 02
Select your preferred compression level — high quality, balanced, or maximum compression.
- 03
Click Compress and wait a few seconds for processing.
- 04
Download your compressed PDF and see the file size reduction percentage.
Common use cases
Email Attachments
Shrink large PDFs to fit under Gmail's 25 MB and Outlook's 20 MB email attachment limits.
Website Performance
Optimize downloadable PDFs for faster page loads, better Core Web Vitals, and improved SEO rankings.
Cloud Storage Optimization
Reduce storage costs on Google Drive, Dropbox, and OneDrive by compressing large PDF archives.
Scanned Document Reduction
Compress scanned contracts, invoices, and reports that often balloon to hundreds of megabytes.
Why choose our PDF Compressor?
Our PDF compressor is a free professional online tool trusted by lawyers, accountants, students, researchers, and businesses worldwide. Unlike desktop PDF software that costs hundreds of dollars per license, our browser-based PDF compression tool delivers instant results with no installation, no signup, and no watermarks. Whether you're emailing contracts to clients, uploading research papers to academic platforms, attaching reports to grant applications, or optimizing PDFs for website downloads, our compressor reduces file size dramatically while keeping text searchable and visuals readable. With support for files up to 50 MB on Pro plans and batch processing for bulk document workflows, our PDF compressor scales from individual users to enterprise document management.
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